| // Copyright 2019 The LUCI Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // Package seccfg interprets SecurityConfig proto message. |
| package seccfg |
| |
| import ( |
| "regexp" |
| "strings" |
| |
| "google.golang.org/protobuf/proto" |
| |
| "go.chromium.org/luci/common/errors" |
| |
| "go.chromium.org/luci/server/auth/service/protocol" |
| ) |
| |
| // SecurityConfig is parsed queryable form of SecurityConfig proto message. |
| type SecurityConfig struct { |
| internalServices *regexp.Regexp // may be nil |
| } |
| |
| // Parse parses serialized SecurityConfig proto message. |
| func Parse(blob []byte) (*SecurityConfig, error) { |
| // Empty config is allowed. |
| if len(blob) == 0 { |
| return &SecurityConfig{}, nil |
| } |
| |
| msg := protocol.SecurityConfig{} |
| if err := proto.Unmarshal(blob, &msg); err != nil { |
| return nil, errors.Annotate(err, "failed to deserialize SecurityConfig").Err() |
| } |
| |
| secCfg := &SecurityConfig{} |
| |
| // Assemble a single regexp from a bunch of 'internal_service_regexp'. |
| if len(msg.InternalServiceRegexp) > 0 { |
| b := strings.Builder{} |
| b.WriteString("^(") |
| for idx, re := range msg.InternalServiceRegexp { |
| if idx != 0 { |
| b.WriteRune('|') |
| } |
| b.WriteRune('(') |
| b.WriteString(re) |
| b.WriteRune(')') |
| } |
| b.WriteString(")$") |
| |
| var err error |
| if secCfg.internalServices, err = regexp.Compile(b.String()); err != nil { |
| return nil, errors.Annotate(err, "failed to compile internal_service_regexp").Err() |
| } |
| } |
| |
| return secCfg, nil |
| } |
| |
| // IsInternalService returns true if the given hostname belongs to a service |
| // that is a part of the current LUCI deployment. |
| func (cfg *SecurityConfig) IsInternalService(hostname string) bool { |
| if cfg.internalServices == nil { |
| return false |
| } |
| return cfg.internalServices.MatchString(hostname) |
| } |